<el-form-item label="手机号:" prop="phone_number">
 <el-input v-model="formPerson.phone_number"></el-input>
</el-form-item>

export default {
 data() {
  var validateMobilePhone = (rule, value, callback) => {
   if (value === '') {
    callback(new Error('负责人手机号不可为空'));
   } else {
    if (value !== '') {
    var reg = /^1[3456789]\d{9}$/;
    if (!reg.test(value)) {
     callback(new Error('请输入有效的手机号码'));
    } else {
     callback();
    }
    }
   }
  };
 
  return{
   formPerson: {
    phone_number: '',
   },
   rules: {
    phone_number: [
    {validator: validateMobilePhone, trigger: 'blur'}
    ]
   },
  }
 }
}

<el-form-item label="手机号:" prop="phone">
 <el-input v-model="formPerson.phone_number"></el-input>
</el-form-item>

rules: {
 phone: [
 {validator: validateMobilePhone, trigger: 'blur'}
 ]
}

  <div class="form-section">
    <p>First Name</p>
    <input type="text" v-model='form.username' v-validated:username="['username',form.username]" placeholder="" >
    <div class="error"></div>
   </div>
    <div class="form-section">
    <p>Last Name</p>
    <input type="text" v-model='form.secondname' placeholder="">
    <div class="error"></div>
   </div>
   <div class="form-section">
    <p>Email</p>
    <input type="email" v-model='form.email' v-validated:email="['email',form.email]" placeholder="">
    <div class="error"></div>
   </div>
   <div class="form-section">
    <p>Password</p>
    <input type="password" v-model='form.password' v-validated:password="['password',form.password]" autocomplete placeholder="">
    <div class="error"></div>
   </div>

import Vue from 'vue'
/**
 * 校验失败
*/
function testError (el) {
 el.style.borderColor = '#d20000'
 el.style.backgroundColor = '#fff8f8'
}
/**
 * 校验成功
*/
function testCorrect (el) {
 el.style.borderColor = '#a3a3a3'
 el.nextElementSibling.innerHTML = ''
 el.style.backgroundColor = 'transparent'
}
/**
 * 校验用户名
 * */
function testUserName (username, el) {
 if (/^\w{3,30}$/g.test(username)) {
  testCorrect(el)
  return true
 } else {
  testError(el)
  el.nextElementSibling.innerHTML = 'Username must be 3 to 30 characters'
  return false
 }
}
/**
 * 校验邮箱
 * */
function testEmail (email, el) {
 if (/^[\w-]+@[\w-]+(\.[\w-]+)+$/g.test(email)) {
  testCorrect(el)
  return true
 } else {
  testError(el)
  el.nextElementSibling.innerHTML = 'Mailbox format is not correct!'
  return false
 }
}
/**
 * 校验密码
 * */
function testPwd (pwd, el) {
 if (/^\w{6,30}$/g.test(pwd)) {
  testCorrect(el)
  return true
 } else {
  testError(el)
  el.nextElementSibling.innerHTML = 'Password must be 6 to 30 characters'
  return false
 }
}

Vue.directive('validated', {
 inserted (el, binding) { // 绑定元素插入父节点时调用
  el.addEventListener('blur', () => {
   switch (binding.value[0]) {
    case 'username' : testUserName(binding.def[binding.rawName], el); break
    case 'email' : testEmail(binding.def[binding.rawName], el); break
    case 'password' : testPwd(binding.def[binding.rawName], el); break
   }
  })
 },
 update: function (el, binding, vNode) { // 更新元素信息时调用
  binding.def[binding.rawName] = binding.value[1]
 }
})
export default {
 init () {
  console.log('*** validated installed ***')
 }
}